Have an '88 Merc 100hp on a 17' Searay and cant figure out the beep alarm. At first, was going off only when we would throttle out of idle. Had the Merc. mechanic come by and tune up, he said tell-tale was fine, oil looked good, and temp seemed good. (Of course it didn't come on for him). Now, after a few more short trips with it coming on near the end, as soon as I turn the key Without even cranking the motor it starts to sound? Any thoughts, bad sensor?
